add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# locally computed
sha256  9fb68236a6871c163e52433ba8f2cce142c0f4208163a2962768c13f262d549f  evtest-1.33.tar.gz
sha256 ab15fd526bd8dd18a9e77ebc139656bf4d33e97fc7238cd11bf60e2b9b8666c6  COPYING